Low-voltage intelligent double-power-source change-over switch

Abstract

The invention provides a low-voltage intelligent double-power-source change-over switch. A main power source, a secondary power source, a load power source wiring port, a red indicator lamp, a green indicator lamp, a liquid crystal display, a communication interface and various keys are arranged on a switch cover of the low-voltage intelligent double-power-source change-over switch; four driving energy-storage capacitors and a sampling circuit board are mounted in a left cavity of a switch base of the low-voltage intelligent double-power-source change-over switch; a main charging module, a secondary charging module, a main automatic voltage transformer, a secondary automatic voltage transformer, and three voltage mutual inductors are mounted on the sampling circuit board; a secondary capacitor and a control circuit board are mounted in a right cavity of the switch base; a main power source module, a secondary power source module, a main processor and a secondary processor are mounted on the control circuit board; four vacuum electromagnetic driving change-over switches respectively controlling an A phase power source, a B phase power source, a C phase power source and an N phase poser source are mounted in a middle cavity of the switch base; and a main power source lead-in wiring end, a secondary power source lead-in wiring end and a load power source lead-out sleeve are arranged on the switch. The invention provides a carrier capable of being actually applied to realizing the comprehensive intelligentization of functions of digital signal collection, processing, control and communication, and has the advantages of small size, compact structure, and convenience in utilization and installation.

Description

technical field [0001] The invention relates to a switch device for automatic switching of dual power sources on a low-voltage power grid, especially a switch device capable of digital signal acquisition and processing to realize intelligent conversion of dual power sources. Low-voltage electrical equipment field. Background technique [0002] At present, our country has proposed the concept of developing an intelligent grid, which also includes the intelligence of the low-voltage grid, and the intelligence of the low-voltage grid also includes the intelligence of the dual power switch. The intelligence of the automatic transfer switch must have comprehensive information perception capabilities, intelligent control capabilities, remote communication capabilities, and large current carrying and breaking capabilities. At present, our country is moving in this direction. Major professional low-voltage electrical appliance manufacturers and scientific research institutes have d...

AI Technical Summary

Problems solved by technology

The communication does not adopt the standard fieldbus communication method

[0004] 2. The conversion drive of the transfer switch is completed by the corresponding electromagnetic driver or motor energy storage mechanism, which has complex structure, low efficiency, poor reliability and long conversion time

[0005] 3. The operation mode is mechanical, without considering the integrated design of the driver and high-efficiency arc extinguishing, and without considering the digital control of the driver

[0006] 4. When the transfer switch operates or is abnormal, the alarm information such as sound, light, and text cannot be issued in time

[0007] 5. Can't self-rectify whether the running condition is good, can't monitor the running condition of the main circuit online

[0008] 6. The control method is local. Most transfer switches can only be manually controlled on site to achieve conversion. They do not have remote or remote control functions. Only a few transfer switches have communication functions, which can realize the operation of remote conversion positions, but the information exchanged is extremely difficult. limited

[0009] 7. The functions of remote control, remote signaling, telemetry, and remote adjustment are not perfect. Although the transfer switch realizes the free setting of some parameters, it can only be set mechanically on the spot.

[0010] 8. The large current that the transfer switch can carry is limited, and efficient arc extinguishing medium and reliable and efficient driving mechanism are not used

Images